1113221201 has 2 divisors, whose sum is σ = 1113221202. Its totient is φ = 1113221200.

The previous prime is 1113221171. The next prime is 1113221203. The reversal of 1113221201 is 1021223111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 571449025 + 541772176 = 23905^2 + 23276^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1113221201 is a prime.

It is a super-3 number, since 3×1113221201³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 1113221203, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1113221203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556610600 + 556610601.

It is an arithmetic number, because the mean of its divisors is an integer number (556610601).

Almost surely, 2^1113221201 is an apocalyptic number.

It is an amenable number.

1113221201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113221201 is an equidigital number, since it uses as much as digits as its factorization.

1113221201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1113221201 is about 33364.9696688008. The cubic root of 1113221201 is about 1036.3994080313.

Adding to 1113221201 its reverse (1021223111), we get a palindrome (2134444312).

The spelling of 1113221201 in words is "one billion, one hundred thirteen million, two hundred twenty-one thousand, two hundred one".